Not only did those who broke into the Capitol fail to wear masks to protect their health and identity, but most/all brought with them their own personal tracking device, which some used to document their illegal acts.
A Q someone asked on these here interwebs:
Question: can’t we find out who breached the Capitol by using GPS phone data from the various cell phone carriers? Check the location and time and we would know who’s phone was inside the Capitol.
Is GPS locationing precise enough to identify who enter the Capitol building area, and who stayed outside the perimeter? I doubt it.
I wonder if some invaders logged on to the Capitol wifi. My phone automatically accesses available public wifi. Using Capitol wifi would probably be a pretty good tell who was inside.
In any case, GPS/phone location should be able to easily identify who was part of the protest crowd, and then use pictures and video to visually ID those who illegally entered.